/*
 * Copyright (c) 2018-2020 "Graph Foundation,"
 * Graph Foundation, Inc. [https://graphfoundation.org]
 *
 * This file is part of ONgDB Enterprise Edition. The included source
 * code can be redistributed and/or modified under the terms of the
 * GNU AFFERO GENERAL PUBLIC LICENSE Version 3
 * (http://www.fsf.org/licensing/licenses/agpl-3.0.html) as found
 * in the associated LICENSE.txt file.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 */
/*
 * Copyright (c) 2002-2018 "Neo Technology,"
 * Network Engine for Objects in Lund AB [http://neotechnology.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
package org.neo4j.helper;

import java.io.File;
import java.io.IOException;

import org.neo4j.io.fs.FileUtils;

import static java.lang.System.getenv;

public class StressTestingHelper
{
    private StressTestingHelper()
    {
    }

    public static File ensureExistsAndEmpty( File directory ) throws IOException
    {
        FileUtils.deleteRecursively( directory );

        if ( !directory.mkdirs() )
        {
            throw new RuntimeException( "Could not create directory: " + directory.getAbsolutePath() );
        }
        return directory;
    }

    public static String fromEnv( String environmentVariableName, String defaultValue )
    {
        String environmentVariableValue = getenv( environmentVariableName );
        return environmentVariableValue == null ? defaultValue : environmentVariableValue;
    }
}
